Associations of Person-Centred Care, Organisational Communication Satisfaction, and Ethical Climate with Job Involvement Among Intensive Care Unit Nurses in South Korea: A Cross-Sectional Study

Background/Objectives: Job involvement reflects nurses’ psychological identification with their jobs. This study examined the associations of person-centred care, organisational communication satisfaction, and ethical climate with job involvement among intensive care unit (ICU) nurses in South Korea. Methods: A cross-sectional descriptive correlational study was conducted in August 2025 among 217 ICU nurses from three general hospitals using self-administered questionnaires. Data were analysed using Pearson’s correlation coefficients and hierarchical multiple regression. Gender, educational level, and total clinical experience were entered first, followed by ethical climate, organisational communication satisfaction, and person-centred care subdomains. Results: Job involvement was positively correlated with person-centred care (r = 0.637), organisational communication satisfaction (r = 0.598), and ethical climate (r = 0.536; all p < 0.001). The final regression model explained 53.4% of the variance in job involvement (R2 = 0.534; adjusted R2 = 0.491), with person-centred care subdomains accounting for an additional 8.7 percentage points (ΔR2 = 0.087). The vertical (β = 0.385) and horizontal (β = 0.209) communication subdomains, along with the prerequisites subdomain of person-centred care (β = 0.191), demonstrated independent positive associations. The communication media subdomain (β = −0.166) showed a negative coefficient despite its positive bivariate association, warranting cautious interpretation. Conclusions: The findings highlight the relevance of nurses’ communication experiences with superiors and peers, alongside the professional attributes that support person-centred practice, in understanding job involvement in ICU settings. Longitudinal and interventional studies are needed to clarify the temporal nature of these associations and evaluate organisational implications.